System and Method for Collaborative Ink Management

2. The system of claim 1, wherein each block is defined to include identification information identifying at least that block and content information on at least the handwriting input associated with that block.

3. The system of claim 1, wherein each of the computing devices is configured to edit the document and wherein the handwriting input is captured as digital ink or gestures.

4. The system of claim 1, wherein the content information includes the addition of new content or the editing of existing content, wherein the content information is a stroke, a typeset content, an extra-content or a stroke manipulation, such as erase, move, style, resize.

5. The system of claim 2, wherein the blockchain is defined so that links between the blocks are formed based on the identification information of each block.

6. The system of claim 2, wherein the processor is further configured to define the identification information based at least on time information on a time of the handwriting input of the respective content information, wherein each block, after the initial block of the blockchain, is linked to one block having time information in a time-order before the time information of that block.

7. The system of claim 1, wherein the at least one non-transitory computer readable medium of the first computing device is further configured to: link a copy of the branched block having the content information on the handwriting input to the first input interface to a branched block having time information in a time-order immediately before the time order of the copied branched block.

9. The method of claim 7, wherein each block is defined to include identification information identifying at least that block and content information on at least the handwriting input associated with that block.

10. The method of claim 9, wherein the blockchain is defined so that links between the blocks are formed based on the identification information of each block.

11. The method of claim 9, further comprising: defining the identification information based at least on time information on a time of the handwriting input of the respective content information, wherein each block, after the initial block of the blockchain, is linked to one block having time information in a time-order before the time information of that block.

12. The method of claim 8, further comprising, at the at least one non-transitory computer readable medium of the first computing device: linking a copy of the branched block having the content information on the handwriting input to the first input interface to a branched block having time information in a time-order immediately before the time order of the copied branched block.

14. The non-transitory computer readable medium of claim 13, wherein each block is defined to include identification information identifying at least that block and content information on at least the handwriting input associated with that block.

15. The non-transitory computer readable medium of claim 14, wherein the blockchain is defined so that links between the blocks are formed based on the identification information of each block.

16. The non-transitory computer readable medium of claim 14, wherein the method further comprises: defining the identification information based at least on time information on a time of the handwriting input of the respective content information, wherein each block, after the initial block of the journal, is linked to one block having time information in a time-order before the time information of that block.

17. The non-transitory computer readable medium of claim 13, wherein the method further comprises, at the first computing device: linking a copy of the branched block having the content information on the handwriting input to the first input interface to a branched block having time information in a time-order immediately before the time order of the copied branched block.